Bolivian President Rodrigo Paz has declared a state of emergency after weeks of protests demanding his resignation.

The move would give Paz broader powers to clear road blocks by demonstrators, which have caused serious shortages of basic goods and paralysed large parts of the nation.

In a statement, the president said the state of emergency would "free the country's roads" and "restore" normalcy.

Under law, Bolivia's Congress must approve or reject the measure within 72 hours of the declaration.

The blockades, led by miners, farmers and indigenous groups, are part of protests which started at the end of April.

Several people have died and hundreds have been arrested during the unrest.

Protest groups are calling for fuel subsidies to be reinstated and a rollback of austerity measures, as well as demanding Paz's resignation.

The president has said the crisis is an organised attempt to destabilise the country.

"Bolivians cannot continue to be hostages of blockades that prevent working, studying, receiving medical attention, supplying themselves, and bringing sustenance to their homes," he said in a social media post on Saturday.

Paz's announcement came hours after he unveiled that a deal had been struck with the country's main union, the Bolivian Workers' Confederation.

However, some Indigenous groups have said they will continue to protest, AFP reported, with roadblocks remaining in place.

Journalists reported seeing police and military personnel in main squares on Saturday.

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